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  • 1995-1999  (2)
  • 1990-1994  (4)
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  • 1
    Electronic Resource
    Electronic Resource
    Response time (1991)
    Springer
    Artificial intelligence review 5 (1991), S. 235-237 
    Details
    ISSN: 1573-7462
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00141755
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    On the second law of thermodynamics (1994)
    Springer
    Journal of statistical physics 77 (1994), S. 217-221 
    Details
    ISSN: 1572-9613
    Keywords: Second law of thermodynamics ; time asymmetry ; Weyl curvature hypothesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The second law of thermodynamics has two distinct aspects to its foundations. The first concerns the question of why entropy goes up in the future, and the second, of why it goes down in the past. Statistical physicists tend to be more concerned with the first question and with careful considerations of definition and mathematical detail. The second question is of quite a different nature; it leads into areas of cosmology and quantum gravity, where the mathematical and physical issues are ill understood.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02186840
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    In {2 2} vacuums, the null-datum on null rays is exactlyr −5 (1995)
    Springer
    General relativity and gravitation 27 (1995), S. 1323-1325 
    Details
    ISSN: 1572-9532
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract It is shown, by a simple argument, that in any {2 2} (i.e. type D) vacuum space-time, the complex component of the Weyl curvature (spinor Ψabcd) along any light ray is precisely proportional tor −5, wherer is the standard Schwarzschild radial coordinate, or its natural complex generalization for the arbitrary {2 2} case.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02153320
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    On Gravity's role in Quantum State Reduction (1996)
    Springer
    General relativity and gravitation 28 (1996), S. 581-600 
    Details
    ISSN: 1572-9532
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The stability of a quantum superposition of two different stationary mass distributions is examined, where the perturbing effect of each distribution on the space-time structure is taken into account, in accordance with the principles of general relativity. It is argued that the definition of the time-translation operator for the superposed space-times involves an inherent ill-definedness, leading to an essential uncertainty in the energy of the superposed state which, in the Newtonian limit, is proportional to the gravitational self-energyE Δ of the difference between the two mass distributions. This is consistent with a suggested finite lifetime of the order of ħ/E Δ for the superposed state, in agreement with a certain proposal made by the author for a gravitationally induced spontaneous quantum state reduction, and with closely related earlier suggestions by Diósi and by Ghirardiet al.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02105068
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    Paper (German National Licenses)
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  • 5
    Book
    Book
    Computerdenken: die Debatte um künstliche Intelligenz, Bewußtsein und die Gesetze der Physik (1991)
    Heidelberg :Spektrum der Wissenschaft,
    Details
    Title: Computerdenken: die Debatte um künstliche Intelligenz, Bewußtsein und die Gesetze der Physik
    Author: Penrose, Roger
    Publisher: Heidelberg :Spektrum der Wissenschaft,
    Year of publication: 1991
    Pages: 454 S.
    Type of Medium: Book
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    ZIB Catalog
    Zuse Institute Berlin get availability status
  • 6
    Book
    Book
    Shadows of the mind: a search for the missing science of consciousness (1994)
    Oxford u.a. :Oxford University Pr.,
    Details
    Title: Shadows of the mind: a search for the missing science of consciousness
    Author: Penrose, Roger
    Publisher: Oxford u.a. :Oxford University Pr.,
    Year of publication: 1994
    Pages: 457 S.
    Type of Medium: Book
    Library Location Call Number Volume/Issue/Year Availability
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    ZIB Catalog
    Zuse Institute Berlin get availability status
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